Traction element



Nov. 18, 1941.

W. O. BECHMAN ETAL TRACTION ELEMENT Filed April l2, 1940 Patented Nov. 18, 1941 l TRACTION ELElWENT William O. Beckman and Rudolph A; Holmberg,

Chicago, Ill., assignors to International Harvester Company, a corporation of NewJersey Application April l2, 1940, Serial No. 329,322

6 Claims.

.This invention relates to .a traction element, and more .particularly .to a wheel lug of the double -or Siamese type.

'The invention vcontemplates and has for its principal object the .provision of a double lug for a wheel having a narrow-width rim, wherein a traction element is formed with a body portion adapted to be secured to the wheel rim and having a pair of rintegral lugs formed thereon adapted to extend respectively at opposite sides of the rim.

An important'object is to provide an improved lug of the type referred to, which is simple and easy :to manufacture and which incorporates pro- Visionszadaptin'g the lug for eiicient use. A complete understanding iof these and other objects of the invention will be had from the following detailed description taken in conjunction with the 'accompanying sheet of drawings, in which:

Figure `l is a side View of the improved lug as attached to the rim of a wheel;

Figure 2 is aplan view of the same;

vFigure 3 is an end View of the same;

Figure 4 is a transverse sectional view taken on Athe line 4 4 of Figure l; and,

:Figure 5 is a bottom view of one end portion ofthe lug, showing the mounting pads.

Only a portion of'a wheel of a generally conventional type has 'been illustrated in the drawing at IIJ. The rim is of the narrow-width type, having a rim lpreferably formed as a-channel, as shown. Only 'that portion of the wheel is shown as is necessary to illustrate the improved lug forming the subject matter of the invention. As best shown in Figure 2, the lug comprises a body portion 'I'I of narrow width, generally conforming to the width of the rim of the wheel IIJ, This body portion is generally semicylindrical in cross-section, Yas best shown in Figure 4, having outwardly tapering outer surfaces I2. These surfaces are adapted to be disposed outwardly when the lug is secured to the wheel. The body vportion is preferably cut out or formed hollow, as at I3. Each end of the body portion, atthe under surface thereof, is provided with a plurality offmounting pads I5adapted to engage the fouter peripheral surface of the rim of the wheel IU. The provision of the pads I5 space the remainder of the under surface of the body portion II from. the periphery of the rim.

The body portion is provided at one end thereof with a traction lug I6 preferably formed integral therewith. The lug I6, as shown in Figures 2 and 3, extendslaterally'at oneiface of the wheel and is tapered radiallyoutwardly to ,provide agroundpenetrating point. The opposite end of l-f'the body is provided with a similar lug I1 extending at the other face of the wheel. The lugs are thus adapted to overhang the sides of the wheel, and are thus generally more effective in providing traction than lugs mounted directly in the yplane of the wheel rim, since the overall eiiective width of the rim is increased by the overhanging lugs.

The body portion is provided with a pair of openings IB spaced circumferentially as respects the wheel. These openings I8 are respeotively'in alinernent with the lugs I6 and I1; that is to say, aplane passing through the axis of one open ing F8 passes also through the center line of the proximate lug. The openings I8 are adapted to receive bolts I9 for securing the element tothe wheel II). .Each opening is 'substantially sur` rounded 'by walls provided by the body portion by means of -a recess `2Il beingformed therein. The lbolt includes ahead 21| which is accommodated by the recess. The Ibolt includes also a nut 2-2 threaded vthereon inthe usual manner for securing the element to the wheel. Each bolt further includes a spacer v23 adapted to fill in the space between 'the side -walls ofthe channel forming the wheel rim. This arrangement is `best shown .in Figure 3.

As previously mentioned, each end of vthe body is provided with a plurality of mounting pads I5. As seen in Figure l5, these pads are located in proximity to `the respective bolt-receiving opening I8. Thus, when the element is secured to the wheel, the .pads I5 Vprovide finished surfaces which adapt the lugs or elements to rest rigidly and securely on the wheel rim. In addition to the mounting pads I5, the `body includes a second set of vmounting pads. These pads are provided by a downwardly 'extending integral portion of a lug I6 or I'I. This portion, as generally indicated at 24 in Figure 4, includes a pair loi spaced mounting pads 25 at the inner side thereof. This is also shown in Figure 5. These pads are adapted to engage .the respective side wall of the wheel rim. The cooperation between the sets of mounting pads I5 and25 provides for additional rigidity between the wheel yand the traction element.

As best shown in Figure 3, the lugs I6 and II, in addition to being spaced circumferentially as respects the wheelrim, are also spaced laterally, so that each lug-extends upwardly and outwardly from the body -II at afpoint adjacent the respective side of the body. There is thus provided av considerable space between the lugs which contributes-tovtheproperties of the lugas being self-` cleaning. 'The tapering surfaces I2 formed on the body Il also contribute to the ability of the lug to keep itself free from soil. The recessing of the bolt heads 2| on the bolts I9 eliminates i f merous modifications and alterations may be made therein without departing from the spirit and scope of the invention as dened in the appended claims.

What is claimed is:

1. A traction element for a traction wheel having a narrow-Width rim, comprising a body of narrow width adapted to be disposed at the periphery of the rim, said body being generally semicylindical and having an under surface provided with a pair of spaced mounting pads adapted to engage the rim, said pads being spaced circumferentially as respects the wheel, the curved surface ofthe body being adapted to face outwardly from the wheel, a pair of lugs formed integral with the body and spaced circumferentialvly as respects the wheel, said lugs being alined respectively with the mounting pads, one lug extending at one side of the body at one end thereof and the other lug extending at the other side of the body at the other end thereof, said lugs being thereby adapted respectively to overhang the opposite sides of the wheel rim, said body .being formed with a pair of spaced openings alined respectively with the lugs and extending through the body generally along radii of the f wheel and adapted to receive bolts for securing the element to the wheel, the bodybeing recessed at its outer side at each opening to accommodate the heads of the securing bolts.

2. A traction element for a traction wheel having a narrow-width rim, comprising a body of narrow width adapted to be disposed at the periphery of the rim, said body having an outwardly tapering outer surface and an under surface adapted to engage the rim, theI tapering surface of the body being adapted to face outwardly from the wheel, a pair of lugs formed integral with the body and spaced circumferentially as respects the Wheel, one lug extending at one side of the body at one end lthereof and the other lugextending at the other side of the body at the other end thereof, said lugs being thereby adapted` respectively to overhang the'opposite sides of the wheel rim, said body being formed with a pair of spaced openings alined respectively with the lugs and extending through the body generally along radii of the wheel and adapted to receive bolts for securing the element to the wheel, the body being recessed at its outer side at each opening to accommodate the heads of the securing bolts.

3. A traction element for a traction wheel having a narrow-width rim, comprising a body of narrow width adapted to be disposed at the periphery of the rim, said body having an under surface provided with a pair of spaced mounting pads adapted to engage the rim at its periphery, said pads being spaced circumferentially as respects the wheel, a pair of lugs formed integral with the body and spaced circumferentially as respects the wheel and each including a portion engaging a side of the rim, said lugs being alined respectively with the mounting pads, one lug extending at one side of the body at one end thereof and the other lug extending at the other side of the body at the other end thereof, said lugs being thereby adapted respectively to overhang the opposite sides of the wheel rim, said body being formed with a pair of spaced openings alined respectively with the lugs and extending through the body generally along radii of the wheel and adapted to receive boltsfor securing the element to the Wheel, the body being recessed at its outer side at each opening to accommodate the heads of the securing bolts.

4. A traction element for a traction wheel hav-l ing a narrow-width rim, comprising a body of narrow width adapted to be disposed at the periphery of the rim, said body having an outwardly tapering outer surface and an under surface provided with a pair of spaced mounting pads adapted to engage the rim periphery, said pads being spaced circumferentially as respects the wheel and the body portion between the pads being thereby adapted to bespaced from the rim periphery, the tapering surface of the body being wheel rim, said body being formed with a pair` of spaced openings alined respectively with the lugs and extending through the body generally along radii of the wheel and adapted to receive boltsfor securing the element to the wheel, the

body being recessed at its outer side at each opening to accommodate'the heads of the securing bolts.-

5. A tractio-n element for a traction wheel having a narrow-Width rim, comprising a body of narrow width adapted to be disposed at the periphery of the rim, said body having an outwardly tapering outer surface and an under surface adapted to engage the-` rim, the tapering surface of the body being adapted to face outwardly from the wheel, a vpair of lugs formed integral with the body and spaced circumferentially as respects the wheel, one lug extending at one side of the body at one end thereof and the other lug extending at the other side of the body at the other end thereof, said lugs-being thereby having a narrow-width rim, comprising a body K of narrow width adapted to be disposed at the periphery of .the rim, said body having an under 'surface provided with spaced mounting pads adapted to engage the rim, said pads being spaced circumferentially as respects the wheel, a pair of lugs formed integral'with the body and spaced circumferentially as respects the wheel and alined respectively alined with the rst named pads,y

said body being formed with a pair of lspaced openings alined respectively With the lugs and extending through the body generally along radii of the wheel and adapted to receive bolts for securing the element to the Wheel.

WILLIAM O. BECHMAN. RUDOLPH A. HOLMBERG. p 

